Method of manufacturing veneered lumber



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Feb. 27, 1923 B. C. ROCKWELL METHOD 0F MANUFACTURING VENEERED LUMBER F11-ed June 1, 1922 Paenea Feb. 27, 192s.

Bynnc. RocK'wELI'., or csiiinmmnnmirrsns. l

' METHOD or yr/Leiiwurhcfrunlruer VENEREDIKLUVMBER.; Y'

T V all wlw/m t may coacewb'l' y Be it known that I, BYRDC. RooKwnLmfa citizen of the United States, residing at the city-of- Camden, county of Ouachita, and State of Arkansas, haveinventeda certain new and useful Improvement in Methods of Manufacturing Veneered Lumber, of which the following is a -full,clear,'and exact dev scription, such as., will enable others'slrilled intheart-to which vitapp'ertains toma-ke and useY the same, referencelbeing had to the accompanying drawings, "for'ming l part vof thisapplication.- Y' f Y, f

My invention relates toV veneered -lumber and the method of producing the same, and

the objects of the invention are to ymanufacture veneeredlumber by a fsimple and 'ei'iiV-' cient methody which is' inexpensivefand' can'Y be easily practiced..l Y Further objects tofjmyinvention arefto manufacture veneered lumber` in which thef base or core 4section is formedof a cheaper' grade of lumber 'while the 4face or Ven'eeredv portion is formed ofa highgrade material, preferably hardwood/'V jv StillV furtherobjects of my invention arev to initially form the base or core sectlon 1n sucha manner that the veneer section' when applied thereto will bey confined'A inV position thereon-'and helda'gainst displacement while the adhesive used to securev the sections to'- gether is drying. My invention consists in thevariousfeatures hereinafter setforth and illustrated 1ny the accompanying drawings, in"'which' Figurelis afperspective detail viewr of a pair of. core or base sections.

Figure 2 is a perspective the veneer strip or section.

Figure 3 isa perspective detail'view of* the core sections' having'their inner sideschanneled for the reception ofthe lveneerV strip.v Y Y f v Figure 4 is a transverse cross-section through the assembled lumber showing the veneer strip occupyingthe channels formed in the core strips. Y f

Figure 5 is a longitudinal cross-section through the veneering machine, and'showing` the assembled lumber in position thereon. Y Y

Figure v6 1 is a 'transverse section 'of the two core sections andthe face strips ardetail view of v waterproof glue, -is applied to each channel methoddisclosedin the'U; Si; Letters Patent, 60'

.cordingf tofmyvpresent method,-two pieces ornstripsQlO voflow grade-lumber, Ysuchlas 7 illustrated infFigurerl, aresecuredfby a suitable adhesive jto the opposite sidesfof la comparatively thin'piecefor strip 1l which is formediof a high grade lumber, preferably hardwood', such as quarter-sawed oak-f 70 This stripfll'v is slightlymorevthan twice the thickness .ofjthe lface strips when :theveneered lumber is finished, so that byfsawing longi-tudinally'V through Arr the veneer` strip 1l after I the adhesive securing the'v assembled 75 stripsY together is set, Il obtain two strips of veneer-ed,jlunriberv eachV of which consists of one of the baseiior" core vpieces 10 having oneA side nishedwith f the sev'er'ed halfxofV the veneerstrip 11;". f l i; JI

In 'practicingmymethom eachvcore.piece a 101is5-formed'inj ione yof its wide flat sur-H -V faces with `ia2 comparatively shallow channelJ l2 A,which providesA upwardly rpresented ledges* or .lf/langes '14. and l5 .along the Aop'-l posite .edges of each corepiece orfsection. The lwidth ofnthese channels 12 -is such that theiveneerstrip'll willvfit snugly into said Vchannel'.y Suitable'adhesive, 'such as 1 2 or tol the wide' surfaces of strip-11 or to both, andthe said -core pieces and said veneerV strip are then assembled together so.` that said :strip-occupies channels'on the oppositely disposedcore sections 10, as shown inv "Figure 4. The combined depth VofIsuch l channels is" less than v'the f thickness of the to be placed'transversely-on saidA conveyors, as shownfinFigure 5. The seatsvof eachv link areangularly disposed lrelative tovr eachL otheri'so. that eachpair of lumber pieces :17

will be inclined from theperpendicularg'the innerer opposed -side walls offeachf-fpair being` inclineddownwardly and inwardly so as to receive at regulargintervals-"a plus rality of wedge members 21, which, whenA driven into position,- placefvrthe assembled lumber under-pressureand causestrips 11- to be held inclosecontactvwitncore--pieces` 10. Thevconveyors are of the' desired length and arefmovedat a required speed! so that when the links carrying the lumber-.reach the dischargezvfendX of the machine,the adhesiveisdry, and saidlumber can #be Vsafely, removed .romthe machine without" dangerg of displacingv the'assembled Ysections- 10andA 11. Y

After the assembled lumberpiece is ree movedv from themachine, it is s'awed"r longie tudinally through the veneer strip 11, as: indicated by lines '00*00 in Figure 4, intot halves or stripsfA, as shown-inf Figuref6, y in' which l1a indicates the severedportionsf of strip 11. Strips A areL then -finished in: thedesired form, one of -suchf forms-'being shown in Figure 27 whereingroovesQQfands -tongues23 are formedinf the side'edgesl-of thei coreL sections V`when said; strips are 'to be used as :veneere'd iooringc: lumber. The ledges-,15 areof greaterwidth than:-ledges,A 14 in order to -provide=sulicientv stock -fo'i'fl the formation 4of tongues2-3. I

By my improved inethod,`I am enabled-toe use-fa f veneer strip `which is substantially` twice thelthickness'of' the face lstrip of the finished liimber,therebyreducingthe costf ofv manufacturing. said`v face strips andv eliminat ine-the dan erpof breakingV said 'stri sand# reducing the numberof steps' in the y'man-u-k facture-of veneered lumber.

the-assembled pieces together in proper -relation to each other and preventing-displacement `thereof` while the vglue isA setting..v

The severing or sawing throug'ln-the veneer-strip beingdone after lthe assemblingA and gluingV operations, the veneer portion@ of the lumber is; protectedfrom injury dur ingthe manui'acturing operations yandl the faces ofthe severed veneer vportions arev free vsulas'tantany the same-as the Width of the.

The Y veneer f stri 1alsoacts as a ke stri interlockinff from glue and in proper condition to be worked.

lVhat I claim is:

1. The method of producingweneeredKlumberconsistin'g in forni-ingfchannel's 'in the opposite sides of a pair of core sections, then securing by means of an adhesive the channel-"faces osaidy core 'sections toai veneer strip, l,the width oisaid strip .being channels,vthen applying pressure to the sides of said core strips for a period of time, then severing the veneer istrip.,longitudinalflyr into twopieces eachof which secured in position-- fink dzlie'l.v channel; i of; the frespective core section and Atheniinishingy said= core` sections andsafid veneer portions.

2.- The h 'erei-n .described-1 'method of yproducingg veneered lumber 1- consistingl in securing.. byfmeansi yof f an adhesive acompai'ati'vely thin 'stripgof woodyto the opposite acesot a pairfof coreY strips,V then placing said'v assembled Istrips ainderfpressure forva .period of time ,LA then:reinovinge thel pressure from said assembled strips and sawing longitudinally sai,dthinlstripfintei two acestrips each of which-iis Asecured to' oneflofp said 'core strips..

- l3. ThefmethodS of .producing 4veneered lumbergconsistingfin .forming shallow` channelsin theV opposite sides' oit afpair Yof core strips of wood, then securing byfmeans; of an ad*F hesivef; af; veneer -jstrip in Lpositionf in said channels;y the= combined .depth of said channels being lessA -thanthe thickness, otsaidvencen strip 'soi aste provide clearance be-v tweenfthe ledges."formedI by said. channels, then applying pressure 'to'fthewl'sides' of .said 'core strips-,so as toV bring ithe veneerstrip inl closecontact with, said channels, then re.-V leasingsaid glued strips from pressure, land 105 sawing,y longitudinally *l through.. the veneer stripte formi two face strips ,;ea ch of which is secured iny thek channel offthe respective core strip.

4.' The method of producingve-neered lum- 110 ber consisting lin forming shallow' channels in thefopposi-t'e sides-of a pair-oll .core stripsV of wood,V then securing by means A-fof `an ad# hesive a Veneer strip-infposition, in said channels, thecombineddepth of said channels 11 5 being less than thetliickness of said .veneer strip so as; t0 provide clearance between the ledges -orm'edlby saidi xchannels,` then applyn ing-.-piessure to thefsidesof said core strips, so as to bring the veneer strip in close con- 120 tactr's`v1with.- said channels;A then. releasing said glued strips .from pressure and sawing .lonu gitudinally throughtheyeneer strip to form two face strips, each of whichy is secured in theschannelvoii-therespective corestrip, 125 and forming5a'tongule-il and groove on the opposite edges `ofu each core :stri-p.

5. The method of manufacturing tongue and groove'd veneered lumber consisting in ormingsliallow channels in the sides of two 130 core strips, vthen securing by means of an and protrudes `from the channel of the `re adhesive said strips to a veneer stri the spective corev ystrip,r then 'forming tongues latter occupying the channels of sai core vand grooves in the side edgesk of saidl core l10 strips, then applying pressure to the sides strips. si v 5 of the core strips While the glue is Hryinp, In testimony whereof I hereunto afIX my then severing the Veneer strip longitudinal y signature this 27 'da of May 1922. into two face strips each of .which occupies BY D C. RCKWELL. Y 

